Visible crew/equipment: When 007 is on the "Little Nelly" and is about to fly over the village, there's a shot in front of him and you can see another helicopter in the background. This is not the helicopter that attacks Bond later - it must be the one used to film the action from behind.
Visible crew/equipment: When Mimi is escaping from the castle and swinging on the drain pipes, the wire holding the whole lot up is visible. (00:29:10)